TEXAS INSTRUMENTS UC3907DW

The UC3907DW is a Load Share Controller provides all the necessary features to allow multiple-independent-power modules to be paralleled such that each module supplies only its proportionate share to total-load current. This sharing is accomplished by controlling each module's power stage with a command generated from a voltage-feedback amplifier whose reference can be independently adjusted in response to a common-share-bus voltage. The UC3907 controller will reside on the output side of each power module and its overall function is to supply a voltage feedback loop. Either switching or linear designs may be utilized and the control signal may be either directly coupled or isolated though the use of an optocoupler or other isolated medium. Other features are 1.25% accurate reference: a low-loss, fixed-gain current-sense amplifier, a fully differential, high-impedance voltage sensing capability and a status indicator to designate which module is performing as master.